XMLHttpRequestEventTarget.onloadstart
The XMLHttpRequestEventTarget.onloadstart
is the function
called when an XMLHttpRequest
transaction starts transferring data.
Syntax
XMLHttpRequest.onloadstart = callback;
Values
callback
is the function to be called when the transaction begins to transfer data.
Example
var xmlhttp = new XMLHttpRequest(),
method = 'GET',
url = 'https://developer.mozilla.org/';
xmlhttp.open(method, url, true);
xmlhttp.onloadstart = function () {
console.log("Download underway");
};
xmlhttp.send();
Specifications
Specification | Status | Comment |
---|---|---|
XMLHttpRequest | Living Standard | WHATWG living standard |
Browser compatibility
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